What is modem?
admin Modem is a device which is used to connect two computers with the help of ordinary telephone lines. Voltage changes are not tolerated by our ordinary telephone lines. This limitation…
Explain the working of the modems?
As we know that the computers can’t understand our language. Computers understand the language of 0’s and 1’s i.e. digital form. The modem will modulate the signal into a sine…
What is Fax?
FAX is basically a technique of reproducing a document electronically at a distant place. FAX machine is an example of digital communication system. Uses of a fax machine: (a) It…
What is space communication?
The receiving, sending and processing of information using space as a medium is called space communication. The information is sent in the form of sound waves. To send the information,…
Explain the atmosphere of earth in respect of Communication?
The envelope made up of gases which is surrounding our earth is known as atmosphere. There are lot of gases which combine together to form the atmosphere. The major composition…
Explain the behavior of atmosphere towards infrared radiations and infrared light?
The atmosphere shows variation in behavior for different types of radiations. The sun and the stars present in our atmosphere are clearly visible to us. This is due to the…
What are the major advantages of the ozone layer?
The major function of the ozone layer is to stop the harmful radiations coming from the sun as well as from stars. Ozone captures those radiations which are of low…
What are Radio Waves?
Those waves which have a frequency range of few kilo hertz to few hundred mega hertz are known as radio waves. The most common frequencies which are used by the…
How electromagnetic waves propagate in Atmosphere?
The magnetic field and electric field oscillations perpendicular to each other or in the direction same as that of the wave propagation as basically known as Electromagnetic waves. The nature…
What is space wave propagation?
The radio waves having high frequencies are basically called as space waves. These waves have the ability to propagate through atmosphere, from transmitter antenna to receiver antenna. These waves can…